Writing Equations
What form of equations do we use for lines?
y = mx + b or slope intercept form.
The slope of a line that goes through
(-1, 7) and (3, 9)
What is 1/2?
The equation 4x - 2y = 10 written in slope intercept form
What is y = 2x - 5?
What is the y-intercept of 7x + y = 6?
y-intercept = 6
y=3x + 7
m=3 and b=7
Write an equation for a vertical line through the point (-3, 3) .
x = -3
The slope of a line that passes through
(0.5, -2) and (5.5, 1)
What is 3/5?
The slope and y-intercept of the line of the equation y = 50 - 3x?
What is m = -3 and b = 50?
What is 10x - 5y = -8 written in slope-intercept form?
y = 2x + 8/5
y=-4x - 5
m=-4 and b=-5
Write an equation for a line with the following slope and points.
m = 2/3 and (0, -2), (3, 0)
y = 2/3x - 2
The slope of a line with the equation y = -6x - 8
What is -6?
The equation of a line (in slope-intercept form) that passes through (0, 4) and (3, 10)
What is y = 6x + 4?
What is the slope of 70x - 10y = 9?
slope = 7
y=x
m=1 and b=0
Write an equation for a line with the following two points. Find the slope and y intercept.
(15, -10) (5, 10)
slope = -2 y intercept = 20
y = -2x + 20
The slope of a line of the equation 4x + 3y = 8
What is -4/3?
The equation of a line (in slope-intercept form) that passes through (-3, -2) and (-6, -5)
What is y = x + 1?
What is the y-intecept of 45x + 5y = 4?
b = 4/5
3x + y = 1
m=-3 and b=1
The amount y (in dollars) of money you have left after playing x games at a carnival is
y = -0.75x + 10.
How much money do you have after playing eight games? Graph the equation and show your explanation.
y = -0.75(8) + 10
y = -6 + 10
y = 4
$4 left after playing 8 games. Graph should begin at (0, 10) on the y-axis and move down three and four to the right.
The slope of a line that passes through
(5, 4) and (5, -8)
What is undefined?
The equation y - 4 = 3(x + 2) written in slope-intercept form
What is y = 3x + 10?
What is slope-intercept form for 10x - y = -10?
y = 10x + 10
-5x + y = -7
m=5 and b=-7